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Achieving Higher ADC Resolution Using …
2008 Microchip Technology 1AN1152 INTRODUCTIONAn Analog-to-Digital Converter (ADC) is an active inter-face between the analog and digital signal chains in anembedded system. An ADC converts analog signalsinto digital signals in electronic systems. The key fea-ture of an ADC is the accuracy ( Resolution ) it offers. Thehigher the desired accuracy, the Higher the ADC ADC accuracy is achieved by designing hard-ware to quantize the analog signal amplitude into thedigital signal with a Higher code-word length. PracticalADCs have finite word effectively strike a balance between system costand accuracy, Higher conversion accuracy is achievedby oversampling the low- Resolution ADC integratedwithin a digital signal controller (DSC), and then pro-cessing the oversampled digital signal in softwarethrough a digital filter and a decimator. This processingscheme, which adds additional bits of accuracy to the12-bit ADC conversion in a dsPIC DSC, is explored inthis application OF OPERATIONAs previously mentioned, ADCs transform analogsignals into digital sample values.
Achieving Higher ADC Resolution Using Oversampling ... an1152
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